/*
 * Copyright (c) 2025 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef COMMON_NATIVE_INCLUDE_WATERMARK_OBSERVER_MANAGER_H
#define COMMON_NATIVE_INCLUDE_WATERMARK_OBSERVER_MANAGER_H

#include <iostream>

namespace OHOS {
namespace EDM {
class IWatermarkObserverManager {
public:
    virtual bool SubscribeAppStateObserver()
    {
        return false;
    }

    virtual bool UnSubscribeAppStateObserver()
    {
        return false;
    }

    static IWatermarkObserverManager* GetInstance()
    {
        std::call_once(observerFlag_, []() {
            if (observerInstance_ == nullptr) {
                observerInstance_ = new (std::nothrow) IWatermarkObserverManager();
            }
        });
        return observerInstance_;
    }

protected:
    static IWatermarkObserverManager* observerInstance_;
    static std::once_flag observerFlag_;
};
}
}
#endif // COMMON_NATIVE_INCLUDE_WATERMARK_OBSERVER_MANAGER_H